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90% of the time, speakers of English use just 7,500 words in speech and writing. These words appear in red, and are graded with stars. One-star words are frequent, two-star words are more frequent, and three-star words are the most frequent.
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The judge described the incident as an act of folly.
It is absolute folly to go mountain climbing without the proper equipment.
She soon realized the folly of her actions.
I pointed out the folly of overspending on that scale.
This is the American English definition of folly. View British English definition of folly.